Weighted holdfast for printing-films.



No. 783,828. 7 PATENTED FEB. 28, 1905.

- B. DAY.

WEIGHTED HOLDFAST FOR PRINTING FILMS.

APPLICATION FILED AUG. 5, 1904.

2 SHEETS-$11331 1,

III

PATENTED FEB, 28, 1905.

B. DAY. WEIGHTED HOLDPAST FOR PRINTING FILMS.

APPLICATION FILED AUG. 5, 1904.

WIT IVE 8858:

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WElGd lFfIEU ItlOlLllDl r iQFf" FUN li l lllltll'li'll l lif'ilhliflfiii SPECIFICATION forming part of Letters Patent No. 783,523,dated February 28, 1905.

Application tiled August 5, 1904-. Serial No. 219,656.

To all who) it 11m cancel-71 Be it known thatl, Bnuaa'ms DAY, a citizenof the United Stateaand a resident of \"Vest floboken, in the county ofHudson and State of New Jersey,have invented a new and lmprored Weightedltioldfast for Printing- Films, of which the following is a full, clear,and exact description.

My invention relates to means for. holding a printing-film in place uponany part of a large piece of work--sueh as a drawii'ig, map, or anylarge flat printing-surface of metal or stono-- my purpose being tosecure the printing-film in a particular arbitrary location, allowingthe same to be raised, lowered, and adiusted in accordance with theusages of the art and yet permitting the printing-liln1 to be used forpurposes of printing byapplying pressure upon its back in theusualmanner.

My device is further intended to enable the operator to shift theprinting-film and its adjustments from one part of the work to anotherby simply lifting it by hand.

A further object of my invention is to economize room and to simplifythe mechanism to a minimum number of parts.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view showing the holdfast ready for use and having aprinting-film connected thereto. Fig. 2 is a side elevation viewed asfrom the left of Fig. 1, parts being in section. Fig. 3 is a frontelevation of the mechanism, partly in section, on the lines 3 3 of Figs.1 and 2. Fig. t is an enlarged sec tion upon the line is of Fig. 3looking in the direction of the arrow, and Fig. 5 is an enlarged sectionupon the line 5 of lfig. 1 looking in the direction of the arrow.

A heavy fiat bar 6 is provided upon its bottom with a facing T, ofcloth, for the purpose of affording a gentle grip as between the bar 6and any surface upon which the same may rest. Mounted upon the bar (*3are vertical standards 8, provided with feet 9, SGOIU'Ctl upon the barby means of screws 10 or other appropriate fastenings. Annular bearings'l '1 are integral with the standards 8. Standards 19., somewhat similarto the stamlards 8, are secured in like manner by means of screws [3 orother fastenings upon the bar 6, and these staiujlards i2 terminate inannular bearings 14. A handle revolubly mounted upon a rod 16, isprovided for the purpose of lifting the entire apparatus around in themanner of lifting a smoothing-iron. The rod 16 is provided at each ofits ends with an annular groove 17, into which [its a screw 18, engagingthe annular bearing 11, and each screw 18 is provided with a milled edge19, whereby it may be manipulated by the lingers. h lountcd upon eachend of the red It is a head 20, secured rigidly to the red by means of akey 21. integral with the head 20 and forming the upper portion thereofis a head provided with bearings 22 22", spaced apart, as indicated inFig.

4.. The central bearing 22-" is provided with a screw 23, which engagesone of the rods 2%, of which thereare two, one at each end of the bar 6.These rods are iarallel with each other and are free to slidelongitiiidinall y through the bearings 22 22", except when clamped bymeans of the screws 23. The rods is are each preferably provided with agroove 29., which engages a boss 22", mounted within one of the bearings22.

At each end of the bar 6 is a sectm' 25, provided with a slot 26, asshown in Fig. Each sector 25 is clamped by a screw 27 and a washer 2.8against the standards it, the screws 27 being manipulated by hand. Therods .24; terl'ninate in heads 29, provided with screws 30 and engagethe ends of a rod 31. Mounted upon the rod 31 are sliding blocks 32-,adapted to be clamped rigidly upon the red by means of a thumb-screw 32.llflach block 332 is provided with bearings 32", loosely encircling therod bl, l )isposed below each screw 32 is a friction-block 32", mountedupon a spring 32 and adapted to be forced downward by the action of thescrew 32, so as to secure the block 32 rigidly in position upon the rod31. The blocks 32 are therefore adjustable both angularly around the rod3 as a center and also longitudiintlly of the rod. The blocks 32 carrythe pivots 33, which engage the hinges 3 1. so as to allow the same tomove angularly upon the pivot 332:3, considered as a center.

The pivots 33 are mounted directly upon adjustable members 32.controlled by screws 32 for the purpose of adjusting the pivots 33relatively to the blocks 32. Each block 32 carries a frame 32, andadjustably mounted upon this frame and integral with the member 32 arebearings 32 for supporting the screws 32'. As the mechanism mounted uponthe blocks 32 is fully described in my Patent No. 666,087forasafety-adjuster for printingfilms, it is not necessary to describethe same again in detail. Suffice it to say that the blocks 32 beingcapable of sliding longitudinally of the rod 31 and of being clampedthereto by means of the screws 32 can be placed any desired distancefrom each other consistent with the length of the rod 31 and can also bemoved to any desired angle relatively thereto. The hinges 3ft and pivots33 are also described in my patent above mentioned. Screws 35, 36, and37 are used for adjusting the pivots 33, also described in myabovementioned patent.

The printing-film is shown at 38 and is mounted in a frame 39, the framebeing adapted to swing angularly upon the pivots 33. as above stated.The work is shown at 40 and may consist of a lithographic stone or of ablock or member of any kind upon which it may be desired to reproducethe design upon the printing-film. It may be mounted upon a support 41so as to bring it to a proper level convenient for the hand and eye ofthe workman.

My invention is used as follows: If it be desired to work upon a stone,such as 40, or upon a block or substantially cubical surface of anykind, the parts are arranged as indicated in Fig. 2. The sector 25 andthe rod 16 are turned a slight fraction of a revolution, so as to bringthe rods 24 into such position that the frame 39 is substantially levelwith the top of the stone &0, and the screws 27 are tightened. The rods24: are now slidably adjusted within the bearings 22 22, so that theprinting-film 38 is in its exact or proper position over the stone 40.The frame 39 may now be raised and lowered upon the pivots 33,considered as a center, and in every instance the printing-film 38 willbe placed in the same position relatively to the stone 40. All of thework to be done with the printing-film in the position which it thusassumes relatively to the stone 40 is now completed, and the flat bar 6is shifted to a different position by means of the handle 15. Theadjustments are now made as above described, and the printing-frame 39is in such position that the printing-film 38 assumes a proper anglewith its position as first applied to the stone 40. Suppose, however,that it is desired to use the printing-film 38 upon the stone 40, whichmay be that of a map, chart, plan, or large piece of paper. The members40 L1 are removed, the screws 23 loosened, the rods 24 drawn to theright from the position indicated in Fig. 2, and the sectors 25 aremoved angularly and set to positions different from those indicated. Theprinting-frame 38 may thus be drawn down directly upon the map orsurface 42 and may be raised and lowered upon the pivots 33 as a center.The work incidental to this particular position having been finished,the bar 6 and all parts supported by it may be moved to a differentangle by means of the handle 15. When the work is finished, the entireapparatus is removed by means of the handle 15.

Having now described my invention, I claim as new and desire to secureby Letters Patent- 1. The combinationof a weighted member, a clothfacing mounted thereupon for producing friction between said member andthe surface whereby it is supported, and mechanism connected with saidweighted member for supporting a printing-film.

2. The combination of a weighted member provided with standards, rodssupported by said standards and movable relatively thereto, andmechanism connected with said rods for engaging a printing-film so as toallow the same to move angularly thereto.

3. The combination of a comparatively heavy member adapted to resttemporarily upon a supporting-surface and provided with standards havingbearings, sectors provided with a revoluble member engaging saidbearings, said sectors being movable relatively to said standards, meansfor clamping said sectors at a predetermined angle at will, bearingsconnected with said sectors and rigid relatively thereto, rods slidablymounted within said bearings, means for clamping said rods relatively tosaid bearings, a longitudinal rod connecting said rods together, andblocks slidabl y mounted upon said longitudinal rod and provid ed withmechanism for allowing a printingfilm to swing thereupon.

4. The combination of a comparatively heavy member provided with asurface for engaging a paper or analogous object upon which work is tobe done, and mechanism connected with said member for supporting aprintingfilm so as to allow the same to move relatively thereto.

5. The combination of a comparatively heavy member provided with asurface for temporarily resting upon the work to be done, a handle forlifting said member, and mechanism connected with said member forsupporting a printing-film so as to allow the same to move angularlyupon a pivot as a center.

6. The combination of a longitudinal bar, means for adjusting the sameto different positions, and mechanism slidably mounted upon said bar andadjustable relatively thereto, said mechanism being provided with pivotsfor supporting a printing-frame.

7. The combination of a comparatively heavy member for temporarilyengaging a surface, mechanism for supporting a printingframe so as toallow the same to swing relatively thereto upon a pivot as a center, andmeans for connecting said mechanism with said member so as to permit theadjusting of relative distances there'between.

8. The combination of a comparatively heavy member provided withstandards, bars supported by said standards and movable angularly inrelation thereto, and mechanism connected with said bars for supportinga printing-frame so as to allow the same to swing around a center.

In testimony whereof I have signed my name to this specification in thepresence of two sub- I5 scribing Witnesses.

BENJAMIN DAY. \Vitnesses:

LEWIS BURGESS, HARRY W. WATRoUs,

